Quote:
|
Come on Simple.... We don't know if we're warming or cooling...or both. regionally we are experiencing extremes but chaos does not support your view.
|
I have to correct this we don't whether a cooling event may be triggered next due the amount of fresh cold water entering the oceans but we do know that the last 30years warming at ~0.2C a decade has occured and this is fast, very fast, the fastest I can find from reports. The same degree of rise over a 1000 years is rapid and thats only once CO2 has chipped in and all the natural forcings must have been present in the past even if we don't even know them all yet they were present.
The civilisation losses tend to be regional although Peru seems particularly prone as the EL Nino imposes its local effects. Also localised warming in Greenland would have a massive local effect and global sea levels effect, add in the ice sheet over North America and all the floods etc can be explained by a hot North cold South.
Man has been arround for 3 million years and has therefore survived several climate changes and has built civilisations for 5-6000 at least and have therefore witnessed several changes in climate although I'm not aware of a world wide loss despite the potential of flooding as the large North American Ice sheets melt.
Putting all the natural forcings into the models that are proving reasonably accurate only produce the warming we are witnessing by adding in man's CO2 amplified by the H2O and relative humidity thing. CO2 is a strong positive forcing in the current balance of forcings and therefore putting more into the atmosphere seems to be tempting providence to me and oil will run out one day so why not just try to go zero GHG now and leave a legacy our decandants can build on.